[Lldb-commits] [lldb] Centralize the code that figures out which memory ranges to save into core files (PR #71772)

[Alex Langford via lldb-commits]

================
@@ -6252,3 +6243,188 @@ Status Process::WriteMemoryTags(lldb::addr_t addr, size_t len,
   return DoWriteMemoryTags(addr, len, tag_manager->GetAllocationTagType(),
                            *packed_tags);
 }
+
+// Create a CoreFileMemoryRange from a MemoryRegionInfo
+static Process::CoreFileMemoryRange
+CreateCoreFileMemoryRange(const MemoryRegionInfo &region) {
+  const addr_t addr = region.GetRange().GetRangeBase();
+  llvm::AddressRange range(addr, addr + region.GetRange().GetByteSize());
+  return {range, region.GetLLDBPermissions()};
+}
+
+// Add dirty pages to the core file ranges and return true if dirty pages
+// were added. Return false if the dirty page information is not valid or in
+// the region.
+static bool AddDirtyPages(const MemoryRegionInfo &region,
+                          Process::CoreFileMemoryRanges &ranges) {
+  const auto &dirty_page_list = region.GetDirtyPageList();
+  if (!dirty_page_list)
+    return false;
+  const uint32_t lldb_permissions = region.GetLLDBPermissions();
+  const addr_t page_size = region.GetPageSize();
+  if (page_size == 0)
+    return false;
----------------
bulbazord wrote:

Why might the page size be 0? If the MemoryRegionInfo is "invalid"?

https://github.com/llvm/llvm-project/pull/71772